Superior selective adsorption of MgO with abundant oxygen vacancies to removal and recycle reactive dyes

One-Dimensional Oxide Nanostructures Possessing Reactive Surface Defects Enabled a Lithium-Rich Region and High-Voltage Stability for All-Solid-State Composite Electrolytes

“…The oxygen-vacancy/Li dopant concentration relationship was further verified using X-ray photoelectron spectroscopy (XPS) (Figure S3). The O 1 s binding energy spectra could be deconvoluted into four characteristic peaks (Figure b), including lattice oxygen (529.8 eV), carbonates (531.6 eV), oxygen-deficient species (532.2 eV), and adsorbed surface oxygen (533.3 eV), corresponding to O I , O II , O III , and O IV regions, respectively. , The oxygen-vacancy-associated regions, O III and O IV , occupied 12.35 and 5.02% of the total integrated peak areas in the spectrum of the 20%LMO sample, respectively, and their sum was maximized. The relationship may be attributed to the complex defects caused by self-compensation between oxygen interstitials and vacancies, suggesting that the Li dopant concentration may affect the resulting self-compensation.…”

Adsorption prospects of ultrafine, cubic 8 mol.% Y2O3‐stabilized ZrO2 nanoparticles

“…Therefore, two distinct interpretations may be proposed in accordance with the above-established possibilities: (i) Presence of the F + -type center indicates a possible situation when an electron replaces the anionic species (O 2− ) from the matrix or when the electron is captured by the oxygen vacancies. 48 It can either remain in the same form of the F + -type center, or O − species may be formed when that oxygen vacancy is partially filled by oxygen species 49 and induces a positive charge by the conversion of O 2− -O − . Cao et al 49 varied the concentration of oxygen vacancies (F + type center) in the adsorbent and found that they provide excellent active sites for adsorption where a greater number of oxygen vacancies led to enhanced adsorption of anionic dyes.…”

“…48 It can either remain in the same form of the F + -type center, or O − species may be formed when that oxygen vacancy is partially filled by oxygen species 49 and induces a positive charge by the conversion of O 2− -O − . Cao et al 49 varied the concentration of oxygen vacancies (F + type center) in the adsorbent and found that they provide excellent active sites for adsorption where a greater number of oxygen vacancies led to enhanced adsorption of anionic dyes. In all cases, oxygens vacancies provide an excess positive surface charge that may eventually aid in the adsorption of CR (anionic dye).…”

Elucidating the effect of intrinsic defects on the dosimetric properties of the MgB4O7compound: an atomistic simulation approach

“…65 At high temperatures (from 400 1C), MgO adsorbs atmospheric oxygen that acts as an electron acceptor, eliminating the F s , F s + , and F s 2+ color centers and forming O 2 À , O 2 2À , O À , and O 2À that can diffuse into the material. 66,[69][70][71][72] In this way, the oxygen species adsorbed by MgO during the synthesis of magnesium tetraborate can be incorporated into the material creating defects.…”